【RabbitMQ消息中间件】7.订阅模式

package cn.jack.rabbitmq.ps;
import cn.jack.rabbitmq.connection.ConnectionUtil;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
 
public class Send {
	
    private final static String EXCHANGE_NAME="test_exchange_fanout";
    
    public static void main(String[] args) throws Exception {
		//获取到连接以及mq通道
    	Connection connection = ConnectionUtil.getConnection();
    	//从连接中创建通道
    	Channel channel = connection.createChannel();
    	
    	//声明Exchange
    	channel.exchangeDeclare(EXCHANGE_NAME, "fanout");
    	
    	//消息内容
    	String message = "Hello World!";
    	channel.basicPublish(EXCHANGE_NAME, "",null, message.getBytes());
    	System.out.println("[product] Send ‘"+ message +"‘");
    	
    	//关闭通道和连接
    	channel.close();
    	connection.close();
	}
}

//声明(创建)队列
channel.queueDeclare(QUEUE_NAME, false, false, false, null);
而该生产者不再声明队列，即不再与队列直接连接，而是换为声明交换机：
channel.exchangeDeclare(EXCHANGE_NAME, "fanout");

package cn.jack.rabbitmq.ps;
import cn.jack.rabbitmq.connection.ConnectionUtil;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.QueueingConsumer;
 
public class Recv1 {
 
    private final static String QUEUE_NAME = "test_queue_ps_1";//队列名称
    
    private final static String EXCHANGE_NAME="test_exchange_fanout";//交换机名称
 
    public static void main(String[] argv) throws Exception {
        // 获取到连接以及mq通道
        Connection connection = ConnectionUtil.getConnection();
        Channel channel = connection.createChannel();
 
        // 声明队列
        channel.queueDeclare(QUEUE_NAME, false, false, false, null);
        
        //绑定队列到交换机
        channel.queueBind(QUEUE_NAME, EXCHANGE_NAME, "");
 
        // 同一时刻服务器只会发一条消息给消费者
        channel.basicQos(1);
 
        // 定义队列的消费者
        QueueingConsumer consumer = new QueueingConsumer(channel);
        // 监听队列，手动返回完成
        channel.basicConsume(QUEUE_NAME, false, consumer);
 
        // 获取消息
        while (true) {
            QueueingConsumer.Delivery delivery = consumer.nextDelivery();
            String message = new String(delivery.getBody());
            System.out.println(" [consumer1] Received ‘" + message + "‘");
            //休眠10ms
            Thread.sleep(10);
            // 返回确认状态
            channel.basicAck(delivery.getEnvelope().getDeliveryTag(), false);
        }
    }
}

// 声明队列
channel.queueDeclare(QUEUE_NAME, false, false, false, null);

//绑定队列到交换机
channel.queueBind(QUEUE_NAME, EXCHANGE_NAME, "");